Find the value of t if the standard deviation of 2t, 3t, 4t, 5t, and 6t is √2
In how many ways can 6coloured chalks be arranged if 2 are same colour?
A box contains 5 blue balls, 3 red balls and 2 white balls. Two balls are selected from the box with replacement. Find the probability of obtaining two blue or two red balls
What is the probability that an integer x,(1 \(\leq\) x \(\leq\) 20) chosen at random is divisible by both 2 and 3?
